CN110753317B - Group management unit, resource management unit and method for operating the same - Google Patents
Group management unit, resource management unit and method for operating the same Download PDFInfo
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- 238000007726 management method Methods 0.000 claims abstract description 109
- 238000013468 resource allocation Methods 0.000 claims abstract description 52
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 238000004590 computer program Methods 0.000 claims description 22
- 230000015654 memory Effects 0.000 claims description 10
- 230000006870 function Effects 0.000 claims description 7
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W4/08—User group management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/18—Interfaces between hierarchically similar devices between terminal devices
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Abstract
Group management unit, resource management unit and method for operating the same. A group management unit (GME) for managing a group of at least two vehicle-side terminal devices of a radio communication network is proposed, wherein the group management unit (GME) determines a resource requirement (req) from a configuration of the group of at least two vehicle-side terminal devices, determines movement information of the group of at least two vehicle-side terminal devices, transmits the resource requirement (req) and the movement information in the direction of a resource management unit (RME), and receives a resource allocation (alloc) in relation to the transmission of the resource requirement (req) and the movement information, wherein the resource allocation (alloc) reserves at least one D2D radio resource only for the group of at least two vehicle-side terminal devices.
Description
Technical Field
The invention relates to a group management unit, a method for operating a group management unit, a resource management unit and a method for operating a resource management unit.
Background
The problem of the prior art is solved by a group management unit according to claim 1, a method for operating a group management unit according to the parallel claim, a resource management unit according to the parallel claim and a method for operating a resource management unit according to the further parallel claim.
Disclosure of Invention
According to a first aspect of the present description, there is provided a group management unit for managing a group of at least two vehicle-side terminal devices of a radio communication network, wherein the group management unit comprises at least one processor, at least one memory with computer program code and at least one communication module, wherein the computer program code is configured such that the computer program code, together with the at least one processor and the at least one communication module, causes: the group management unit determines a resource requirement according to the configuration of the group of the at least two vehicle-side terminal devices, determines movement information of the group of the at least two vehicle-side terminal devices, transmits the resource requirement and the movement information in a direction of the resource management unit, and receives a resource allocation regarding the transmission of the resource requirement and the movement information, wherein the resource allocation reserves at least one D2D radio resource only for the group of the at least two vehicle-side terminal devices.
Advantageously, D2D radio resources are reserved only for groups of vehicle-side terminal devices, which are built, for example, in trucks (LKW) travelling as a train. The allocated D2D radio resources only provide wireless communication for the vehicle-side terminal devices of the fleet/fleet (platon). Thus, the interaction of groups of vehicle-side terminal devices that meet in a geographic region is precluded.
By using movement information and resource requirements, characteristics of vehicles traveling in a train, such as the same movement direction and speed of a plurality of vehicles having stable relative positions and stable speeds to each other, are fully utilized.
Messages are therefore exchanged with short latency and at the same time high reliability within a group (queue/fleet). By means of this communication, for example, the shortest distance between the individual trucks (LKW) can be maintained, since the corresponding maximum braking distance between adjacent vehicles can be complied with by a message delay that is ensured to be short. The short message delay ensured enables the function of the motor vehicle responsible for introducing the emergency braking to react sufficiently quickly. Shorter distances between trucks (LKW) occur with the benefit of leeward and with reduced fuel or energy consumption.
An advantageous example is characterized in that: the group management unit determines a further resource requirement and/or a further movement information, transmits the further resource requirement and/or the further movement information towards the resource management unit, and receives a further resource allocation in relation to the transmission of the further resource requirement and/or the further movement information, wherein the resource allocation reserves at least a further D2D radio resource only for the group of terminal devices on the at least two vehicle sides, and wherein the further D2D radio resource is different from the D2D radio resource reserved previously for the group. Advantageously, the notification by the group management unit about the change of location and/or group configuration receives the further resource allocation, whereby collision of messages of terminal devices of two different teams/groups is prevented.
An advantageous example is characterized in that: the group management unit receives the reduced availability of the resource management unit, for example. The reduced availability relates to D2D radio resources provided to the group of terminal devices at a future point in time. Advantageously, depending on the reduced availability received, the terminal devices of the group can quickly introduce corresponding measures which ensure the operational safety of the group of vehicles.
An advantageous example is characterized in that: the group management unit transmits the received resource allocation to at least one terminal device in the group of terminal devices. Advantageously, the resource allocation is allocated within a group of terminal devices.
According to another aspect, there is provided a vehicle-side terminal device of a group of at least two vehicle-side terminal devices of a radio communication network, wherein the terminal device comprises a group management unit according to any of the preceding claims, and wherein the terminal device exchanges messages with at least one other terminal device of the group over the allocated D2D radio resources.
According to a second aspect of the present specification, there is provided a method of operating a group management unit for managing a group of terminal devices on at least two vehicle sides of a radio communication network, the method comprising: determining a resource requirement according to the configuration of the group of terminal devices on the at least two vehicle sides; determining movement information of a group of terminal devices on the at least two vehicle sides; transmitting the resource requirement and the movement information towards a resource management unit; and receiving a resource allocation in relation to the resource requirement and the transmission of the mobile information, wherein the resource allocation reserves at least one D2D radio resource only for the group of terminal devices on the at least two vehicle sides.
According to a third aspect of the present specification, there is provided a resource management unit for allocating D2D radio resources of a radio communication network, wherein the resource management unit comprises at least one processor, at least one memory with computer program code and at least one communication module, wherein the computer program code is configured such that the computer program code, together with the at least one processor and the at least one communication module, causes: the resource management unit receives resource requirements and movement information from a group management unit for managing a group of at least two vehicle-side terminal devices of the radio communication network; and the resource management unit determining a resource allocation based on the resource requirement and the movement information, wherein the resource allocation reserves at least one D2D radio resource only for the group of the at least two terminal devices; and the resource management unit transmits the resource allocation towards the group management unit.
An advantageous example is characterized in that: the resource management unit receives another resource requirement and/or another movement information of the group of the at least two terminal devices from the group management unit; a resource management unit determining a further resource allocation based on the further resource requirement and/or the further movement information, wherein the resource allocation reserves at least a further D2D radio resource only for the group of the at least two terminal devices, and wherein the further D2D radio resource is different from the D2D radio resource reserved previously for the group; and the resource management unit sends the further resource allocation towards the group of management units. An advantageous example is characterized in that: the resource management unit determines a reduced availability of D2D radio resources of the group provided to the terminal device at a future point in time and transmits the determined reduced availability towards the group management unit.
According to a fourth aspect of the present specification, there is provided a method of operating a resource management unit for allocating D2D radio resources of a radio communication network, wherein the method comprises: receiving resource requirements and movement information from a group management unit for managing a group of at least two vehicle-side terminal devices of the radio communication network; and determining a resource allocation based on the resource requirement and the movement information, wherein the resource allocation reserves at least one D2D radio resource only for the group of at least two terminal devices; and the resource allocation is sent towards the group management unit.
According to a fifth aspect of the present specification, there is provided a management unit for managing a group of terminal devices on at least two vehicle sides of a radio communication network and for allocating D2D radio resources of the radio communication network, wherein the management unit comprises at least one processor, at least one memory with computer program code and at least one communication module, wherein the computer program code is configured such that the computer program code, together with the at least one processor and the at least one communication module, causes: the management unit determines a resource requirement from a configuration of the group of at least two vehicle-side terminal devices, determines movement information of the group of at least two vehicle-side terminal devices, and determines a resource allocation from the resource requirement and the movement information, wherein the resource allocation reserves at least one D2D radio resource only for the group of at least two terminal devices.
According to a sixth aspect, there is provided a method of operating a management unit for managing a group of at least two vehicle-side terminal devices of a radio communication network and for allocating D2D radio resources of the radio communication network, wherein the method comprises: determining a resource requirement (req) from a configuration of a group of the at least two vehicle-side terminal devices; determining movement information of a group of terminal devices on the at least two vehicle sides; and determining a resource allocation (alloc) based on the resource requirement (req) and the movement information, wherein the resource allocation (alloc) reserves at least one D2D radio resource only for the group of at least two terminal devices.
Drawings
In the drawings:
fig. 1 shows a radio communication network in schematic form;
FIG. 2 shows a schematic sequence diagram; while
Fig. 3 shows a schematically illustrated map.
Detailed Description
Fig. 1 shows a radio communication network 2 in schematic form. The first group G1 of vehicles V1, V2 and V3 communicates by means of the respective vehicle-side terminal devices NN1 to NN3 via at least one exclusively allocated D2D radio resource D1 (D2D: device to Device) and coordinates, for example, the vehicle distances D12, D23 and the braking and accelerating maneuvers of the respective vehicles V1 to V3. The D2D radio resources are radio resources for direct communication between the terminal devices NN1 to NN 6. The D2D radio resources also have periodicity. The D2D radio resources used are periodically repeated in the time-frequency domain. The second group G2 of vehicles V4, V5 and V6 communicates by means of the respective vehicle-side terminals NN4 to NN6 via at least one exclusively allocated D2D radio resource D2 and coordinates, for example, the vehicle distances D45, D56 of the respective vehicles V4 to V6 and the braking and accelerating manoeuvres. The at least one D2D radio resource D1, D2 is for example characterized by: periodicity of the allocated ranges in the time and frequency domain. Even if the radio coverage of the two groups G1 and G2 are crossed, i.e. the terminal device NN6 may receive a message from the terminal device NN3, for example, the communication of the groups G1 and G2 does not affect each other since the D2D radio resources D1 and D2 are separated in the time and frequency domain. The separation of D2D radio resources means: these D2D radio resources overlap neither in the time domain nor in the frequency domain.
In addition to direct communication with each other, the terminal devices NN1 to NN6 support the capability to send messages towards an infrastructure element NN7, such as a Remote-Radio-Head (RRH) or a base station, i.e. an eNodeB, over an Uplink (Uplink) Radio resource UL and to receive messages from the infrastructure element NN7 over a Downlink (Downlink) Radio resource DL within a cell-assisted network. The uplink and downlink radio resources UL, DL are centrally allocated, that is to say scheduled, for example by the infrastructure element NN 7. The infrastructure element NN7 includes an antenna A7. The infrastructure element NN7 is connected to network elements NN8 and NN9 for communication. The D2D radio resources D1, D2 are also referred to as Sidelink (sidlink) resources. The vehicle-side terminal devices NN1 to NN6 use D2D radio resources D1, D2, which are not allocated, that is to say scheduled, in a cell-assisted manner.
The vehicle-side terminal devices NN1 to NN6 each include a processor P1 to P6, a communication module C1 to C6, antennas A1 to A6, and memories M1 to M6. The memories M1-M6 are each provided with computer program code configured such that the computer program code together with the at least one processor P1-P6, the at least one communication module C1-C6 and the at least one antenna A1-A6 implement the steps of the group management unit described in the present specification.
The network units NN8, NN9 comprise processors P8, P9, communication modules C8, C9 and memories M8, M9, respectively. The memories M8, M9 are each provided with computer program code configured such that the computer program code together with the at least one processor P8, P9 and the at least one communication module C8, C9 implement the steps of the group management unit and/or the resource management unit described in the present description.
Fig. 2 shows a schematic sequence diagram. The group management unit GME constructs a vehicle-side terminal device for managing at least one of the groups G1, G2 in fig. 1. For example, the group management unit GME is disposed on the terminal device NN1 on the vehicle side as long as it is used only for managing the group G1. In a further embodiment, the group management unit GME is located, for example, on the network element NN8 in fig. 1, wherein the allocated resource management unit RME is arranged on the network element NN 9. In another embodiment, the GME and RME are co-located on the network element NN 8. Of course, there may be a plurality of group management units GMEs.
The resource management unit RME is arranged, for example, at the side of the service provider/network operator and coordinates the D2D radio resources used by the respective groups G1, G2 and other groups. Of course, there may be a plurality of resource management units RME, for example for the respective network operators. The resource management unit RME manages the D2D radio resource pool and allocates these D2D radio resources in accordance with the steps described later.
In step 202, the group management unit GME determines the resource requirement req as a function of the configuration of the group of at least two vehicle-side terminal devices. The configuration of the group includes, for example: the number of terminal devices on the participating vehicle side, the nominal distance between vehicles, the message size, the maximum duration between two messages to be received, the quality of service Level (Quality of Service-Level), the type of service, etc. In the case of train operation (english: fleet (platon)), the number comprises at least two vehicles or vehicle-side terminal devices. The vehicle-side terminals autonomously form groups G1, G2. For example, a terminal device that does not yet belong to the group G1, G2 registers with a queue leader, such as the terminal device NN1 or NN4, and achieves a group-assigned attribute with the queue leader. The resource requirements req are determined by the group management unit according to the configuration of the group. Alternatively, the configuration of the group is determined as the resource requirement req.
In step 204, the group management unit GME determines the movement information loc of the group of at least two vehicle-side terminal devices. The movement information loc includes, for example: absolute position, speed, direction of movement, planned route, final destination of route, etc. The movement information is, for example, from only one terminal device NN1, NN4 of the group G1, G2.
The resource requirements req and the movement information loc are transferred to the resource management unit RME. In step 206 the resource management unit RME determines a resource allocation alloc from the received resource requirements req and the movement information loc. The determined resource allocation is transmitted to the group management unit GME for forwarding to the vehicle-side terminal devices of the respective group. In step 208, the terminal device NN1 on which the group management unit GME is arranged in the present example determines a message N1 for transmission within the group and transmits the message on the D2D radio resource D1 allocated by means of the resource allocation alloc. In step 210, the terminal NN2 uses the information in N1 in order to know which radio resources, i.e. D1, the communication between the members of the fleet should take place in the future or whether the required quality of service can be achieved, for example. Then, the radio resource D1 is used, for example, for: information about, for example, speed values is periodically exchanged between the vehicles, which is required by the fleet regulators located in the respective trucks (LKW) in order to regulate the distance and, if necessary, to prevent fluctuations in the distance that may lead to collisions. If the required quality of service cannot be achieved, the terminal NN2 informs the fleet regulator that the fleet regulator can use this information accordingly. The resource allocation alloc refers for example to a flag within the resource pool that explicitly identifies the corresponding D2D radio resource to be used.
The resource allocation alloc allocates the respective D2D radio resource D1 to the group of terminal devices on the vehicle side in hours, at least in minutes or seconds. Even if the allocation takes only a few seconds, signalling overhead can already be saved compared to LTE-V2X Mode 3. By said long time allocation of D2D radio resources, the transmission of control information is reduced. Furthermore, the allocation is less susceptible to interference if uplink/downlink communication is not possible, e.g. for a period of seconds, minutes or hours. Thus, D2D radio resources are statically allocated and may remain unchanged along the selected route of the group so as to be released again at the end of the route. Alternatively, the D2D radio resources are allocated a maximum time period in effect, which for example covers only a part of the planned route. After expiration of the maximum duration, new D2D radio resources are allocated to the corresponding group.
In one example, RME considers the geographic availability of cellular mobile radios when assigning D2D radio resources. Thus, in case uplink/downlink communication of the group of terminal devices is not available, efficient D2D radio resources are always provided.
In step 212 the group management unit GME determines an update message upd and transmits the update message to the resource management unit RME. The update message upd comprises a further resource requirement and/or a further movement information of the respective group of terminal devices on the vehicle side. In step 214, the resource management unit RME determines a further resource allocation alloc2, which further resource allocation indicates to change D2D radio resources D1 to D2D radio resources D3. In step 216, the vehicle-side terminal NN1 determines a message N2, which is transmitted to the terminal NN2 on the D2D radio resource D3 in accordance with the received further resource allocation alloc 2. In step 218, the terminal NN2 uses the information in N2 in order to know on which radio resource, i.e. D3, communication between members of the fleet should take place in the future or if, for example, the required quality of service can be achieved. Then, the radio resource D3 is used, for example, for: information about, for example, speed values is periodically exchanged between the vehicles, which is required by the fleet regulators located in the respective trucks (LKW) in order to regulate the distance and, if necessary, to prevent fluctuations in the distance that may lead to collisions. If the required quality of service cannot be achieved, the terminal NN2 informs the fleet regulator that the fleet regulator can use this information accordingly. The resource allocation alloc2 refers for example to a flag within the resource pool that explicitly identifies the corresponding D2D radio resource D3 to be used.
In step 220, the resource management unit RME determines a reduced availability red of D2D radio resources of the group provided to the terminal device, wherein the reduced availability red is at a future point in time. This point in time may be transmitted to the group management unit GME, for example, together with the reduced availability red. The reduced availability red is provided to all terminal devices of the group, which may be achieved for example by means of the last allocated D2D radio resource D3. In steps 222, 224, the group is transitioned to a steady state, e.g. increasing the distance between vehicles, in respect of the reduced availability red of the allocated D2D radio resource D3, because the message is expected to collide on the allocated radio resource D3. For example, the reduced availability red is determined by the resource management unit RME when there are an increased number of groups within the same geographical area or there are increased number of groups that will meet at a future point in time and that cannot simultaneously use only the provided D2D radio resources of the resource pool.
Fig. 3 shows a schematic MAP, which is used, for example, in steps 206, 214 and 220 in fig. 2. The groups G3, G4 and G5 of terminal devices are assigned respective coordinates, movement directions R3, R4, R5 according to the illustrated position and are assigned, for example, radio ranges ran3, ran4, ran5. The resource management unit allocates D2D radio resources D4 and D5 of the resource POOL according to the MAP. Thus, the resource management unit, for example, estimates: groups G3 and G4 will be related within one geographical area G and thus groups G3 and G4 are prophylactically allocated different D2D radio resources D4, D5. While groups G3 and G5 are far apart from each other and thus can use the same D2D radio resource D5.
Claims (12)
1. A group management unit for managing a group of at least two vehicle-side terminal devices of a radio communication network, wherein the group management unit comprises at least one processor, at least one memory with computer program code and at least one communication module, wherein the computer program code is configured such that the computer program code, together with the at least one processor and the at least one communication module, causes: the group management unit
Determining a resource requirement according to the configuration of the group of terminal devices on the at least two vehicle sides,
determining movement information of a group of the at least two vehicle-side terminal devices, wherein the movement information comprises a planned route of the at least two vehicle-side terminal devices,
transmitting said resource requirements and said movement information towards a resource management unit, and
a resource allocation is received in relation to the resource requirement and the transmission of the movement information, wherein the resource allocation reserves at least one D2D radio resource only for the group of terminal devices on the at least two vehicle sides.
2. The group management unit of claim 1, wherein the group management unit
Another resource requirement and/or another movement information is determined,
transmitting the further resource requirement and/or the further movement information towards the resource management unit and receiving a further resource allocation in relation to the transmission of the further resource requirement and/or the further movement information, wherein the further resource allocation reserves at least a further D2D radio resource only for a group of terminal devices on the at least two vehicle sides, and wherein the further D2D radio resource is different from the D2D radio resource previously reserved for the group.
3. The group management unit according to claim 1 or 2, wherein the group management unit
A reduced availability of D2D radio resources of a group provided to a terminal device at a future point in time is received, wherein the reduced availability is reported from the resource management unit.
4. The group management unit according to claim 1 or 2, wherein the group management unit
And transmitting the received resource allocation to at least one terminal device in the group of terminal devices.
5. A vehicle-side terminal device of a group of at least two vehicle-side terminal devices of a radio communication network, wherein the terminal device comprises a group management unit according to any of the preceding claims, and wherein the terminal device exchanges messages with at least one other terminal device of the group over the allocated D2D radio resources.
6. A method of operating a group management unit for managing a group of terminal devices on at least two vehicle sides of a radio communication network, the method comprising:
determining a resource requirement according to the configuration of the group of terminal devices on the at least two vehicle sides,
determining movement information of a group of the at least two vehicle-side terminal devices, wherein the movement information comprises a planned route of the at least two vehicle-side terminal devices,
transmitting said resource requirements and said movement information towards a resource management unit, and
a resource allocation is received in relation to the resource requirement and the transmission of the movement information, wherein the resource allocation reserves at least one D2D radio resource only for the group of terminal devices on the at least two vehicle sides.
7. A resource management unit for allocating D2D radio resources of a radio communication network, wherein the resource management unit comprises at least one processor, at least one memory with computer program code and at least one communication module, wherein the computer program code is configured such that the computer program code, together with the at least one processor and the at least one communication module, causes: the resource management unit
Receiving resource requirements and movement information from a group management unit for managing groups of at least two vehicle-side terminal devices of the radio communication network, wherein the movement information comprises planned routes of the at least two vehicle-side terminal devices, and
determining a resource allocation as a function of the resource requirement and the movement information, wherein the resource allocation reserves at least one D2D radio resource only for a group of the at least two vehicle-side terminal devices, and
the resource allocation is sent towards the group management unit.
8. The resource management unit of claim 7 wherein the resource management unit
Receiving further resource requirements and/or further movement information of a group of terminal devices on the at least two vehicle sides from the group management unit,
determining a further resource allocation as a function of the further resource requirement and/or the further movement information, wherein the further resource allocation reserves at least a further D2D radio resource only for a group of terminal devices on the at least two vehicle sides, and wherein the further D2D radio resource is different from the D2D radio resource reserved previously for the group and is transmitted towards the group management unit.
9. The resource management unit according to claim 7 or 8, wherein the resource management unit
Determining a reduced availability of D2D radio resources provided to the group of terminal devices at a future point in time,
the determined reduced availability is sent towards the group management unit.
10. A method of operating a resource management unit for allocating D2D radio resources of a radio communication network, wherein the method comprises:
receiving resource requirements and movement information from a group management unit for managing groups of at least two vehicle-side terminal devices of the radio communication network, wherein the movement information comprises planned routes of the at least two vehicle-side terminal devices, and
determining a resource allocation as a function of the resource requirement and the movement information, wherein the resource allocation reserves at least one D2D radio resource only for a group of the at least two vehicle-side terminal devices, and
the resource allocation is sent towards the group management unit.
11. A management unit for managing a group of terminal devices on at least two vehicle sides of a radio communication network and for allocating D2D radio resources of the radio communication network, wherein the management unit comprises at least one processor, at least one memory with computer program code and at least one communication module, wherein the computer program code is configured such that the computer program code, together with the at least one processor and the at least one communication module, causes: the management unit
Determining a resource requirement according to the configuration of the group of terminal devices on the at least two vehicle sides,
determining movement information of a group of the at least two vehicle-side terminal devices, wherein the movement information includes a planned route of the at least two vehicle-side terminal devices, and
a resource allocation is determined as a function of the resource requirement and the movement information, wherein the resource allocation reserves at least one D2D radio resource only for a group of the at least two vehicle-side terminal devices.
12. A method of operating a management unit for managing a group of at least two vehicle-side terminal devices of a radio communication network and for allocating D2D radio resources of the radio communication network, wherein the method comprises:
determining a resource requirement according to the configuration of the group of terminal devices on the at least two vehicle sides,
determining movement information of a group of the at least two vehicle-side terminal devices, wherein the movement information includes a planned route of the at least two vehicle-side terminal devices, and
a resource allocation is determined as a function of the resource requirement and the movement information, wherein the resource allocation reserves at least one D2D radio resource only for a group of the at least two vehicle-side terminal devices.
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| Application Number | Priority Date | Filing Date | Title |
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| DE102018212201.6 | 2018-07-23 | ||
| DE102018212201.6A DE102018212201A1 (en) | 2018-07-23 | 2018-07-23 | Group management unit, method for operating the group management unit, resource management unit and method for operating the resource management unit |
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| CN110753317B true CN110753317B (en) | 2024-03-05 |
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